Crystal Clean & Protect - Additive for Use with AdBlue® - Prevents Crystallisation in SCR Systems - Enhances Diesel Emission Control Performance - 125ml

Good stuff, second time buying and worked perfect in my Diesel car.

Problem had an easy fix after half a day from putting the liquid in and has very good value for money. Would highly recommend.

I had an engine fault code regarding my Adblue system. Car said I had about 600 miles before car won’t turn on. Very scary. Garages told me it could be very expensive repair. So I used this stuff hoping that my problems would get resolved. And to my surprise it did. Emptied it in my Adblue tank.. drove for around 70 miles and job was a good one. Turned out to be a blocked def injector which this stuff cleaned up. And now no more fault codes as it went away on its own. I will keep using this Crystal Clean & Protect on every Adblue refill.

Problem with your adblue? should've used this

My 2016 Peugeot 3008. 1.5HDi blue had engine fault repair needed and emissions control fault : starting prevented in 700miles. The UREA dash light came on as well. I topped up the ad blue but the errors didn’t go away. I then put this in the ad blue tank and drove it about 100miles over 3 days. In the 3rd day the emissions warning went. The next day the engine fault error had gone as well. Can’t recommend this enough. I thought my car needed a new ad blue tank which is very costly.

This stuff is amazing. Had the dreaded Adblue system failure message on my BMW 520d. Read other reviews saying it cleared up error messages. Didn’t hold much hope but thought I’d give it a whirl. Added 2 bottles to a full tank of Adblue. It took some time (about 3 months) but one day I switched the car on and the persistent error had gone and no longer any engine light! Will use this now every time I top up the Adblue to keep the crystallisation at bay. Worth its weight in gold!

Not sure this really works

Good thanks